16 GEO. H. HORN, M. D. 



however, of its position in the present group. From either ruricola 

 or pedoraUs it may be known by its much larger size and the absence 

 of transverse carina on the clypeus. 



Occurs in Utah, American Fork Canon, at an elevation of 9500 

 feet. 



Group C 



Scutellum small. Anterior tibise tridentate, feebly or obsoletely 

 crenulate above, the anterior face smooth, the first joint shorter than 

 the second. Posterior tibiiB fimbriate with short equal spinules. 

 Front trituberculate. Mesosternum carinate between the coxte. 

 Thorax as wide at base as the elytra. 



In this series we have but few species, one of them introduced 

 from Europe and become quite cosmopolitan. They are as follows : 



First joint of hind tarsus not longer than the next two. Species entirely black. 



graiiariiif^. 



First joint of hind tarsus equal to next three. 



Elytra reddish brown, the suture and side margin piceous; genie not promi- 

 nent vittatiifii. 



Elytra piceous, maculate with small rufous spots ; gense moderately prominent. 



guttatu!!$. 



A. graiiarins Linn. — Oblong, subcylindrical, piceous, shining, legs reddish 

 brown. Antennie rufo-testaceous with darker club. Head distinctly trituber- 

 culate, the clypeus with a feeble transverse ridge, sparsely punctured at middle, 

 more densely at the sides. Clypeus at middle rather feebly emarginate, on each 

 side broadly rounded, the sides arcuate, the geuse very little prominent, obtuse. 

 Thorax convex, very little narrower in front, the sides arcuate, hind angles dis- 

 tinct, but very obtuse, the basal marginal line fine, but entire ; disc variably 

 punctate in the sexes, almost entirely .smooth in the male. Elytra parallel, 

 humeri di.stinct, disc striate, strise serrately punctured, intervals feebly convex 

 and with few very minute punctures. Body beneath piceous or brown. Mesos- 

 ternum opaque in front, carinate between the coxge. Metasternum at sides 

 sparsely punctate, abdomen rugulose and more coarsely punctate at the sides. 

 Posterior femora very .sparsely finely punctate. Length .16-.25 inch ; 4-6 mm. 



Male. — Frontal tubercles very distinct. Thorax larger and more convex, the 

 surface almo.st smooth, with but few fiue punctures sparsely placed. Anterior 

 tibial spur stouter and more arcuate. 



Female. — Frontal tubercles less distinct. Thorax .smaller, less convex and with 

 sparsely placed coarse punctures more numerous toward the sides. 



In this species it will be observed that the first or sutural interval 

 is as wide or even wider than the second, a character not commonly 

 found among the species. 



Originally an inhabitant of Europe, this species has been spread 

 by commercial intercourse throughout the world. In our country it 

 has appeared in every locality from which I have received Aphodii. 



